First off, I'm located in Alabama. I was leaving for work this morning and I counted 11 birds of prey first circling, then diving into my front yard and pasture attacking my chickens. They were attacking mostly 1-2 month old baby chicks but there were a couple of BIG birds that had my adult chickens running scared too. I have NEVER seen more than 1 or 2 hawks together so what the heck is going on? Are these hawks or something else? I can't shoot them because I think it is illegal but they are wiping me out. I tried to scare them off by shouting and waving but they would only fly higher and circle until they saw me leave the immediate area. I had to go to work so I left and as I was driving across my pasture I saw them circling lower and lower. They didn't dive like I thoughts hawks did. They swooped down, then leveled off, then swooped lower then leveled off until they were low enough to attack my chicks. They kind of came in like an airplane landing. They are brown/black/white I think. One flew right over my head and it looked like he had redish eyes. Can somebody tell me what it was and what I can do? What bird of prey attacks in a group of 11 like that?